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Finding the Fourth Proportional to 76,887.52, 106,102.36 and 45,077.60

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Solution

The fourth proportional to 76,887.52, 106,102.36 and 45,077.60 is: 62,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,887.52 : 106,102.36 = 45,077.60 : x
  2. Step 2: Convert to fraction form
    76,887.52/106,102.36 = 45,077.60/x
  3. Step 3: Cross multiply
    76,887.52x = 106,102.36 × 45,077.60
  4. Step 4: Simplify right side
    76,887.52x = 4,782,839,743.14
  5. Step 5: Solve for x
    x = 4,782,839,743.14/76,887.52
  6. Step 6: Final answer
    x = 62,205.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.